Segment Information (Tables)

3 Months Ended

Mar. 31, 2016

Segment Reporting [Abstract]

Schedule of segment reporting information, by segment

The following tables present operating information about the Company’s reportable segments for the periods indicated (in thousands):

Three Months Ended March 31, 2016	Research		Consulting		Events		Consolidated
Revenues	$	440,271	$	84,940	$	32,055	$	557,266
Gross contribution	308,186		29,378		12,983		350,547
Corporate and other expenses							(286,118		)
Operating income							$	64,429

Three Months Ended March 31, 2015	Research		Consulting		Events		Consolidated
Revenues	$	381,090	$	76,792	$	13,304	$	471,186
Gross contribution	267,065		26,327		2,442		295,834
Corporate and other expenses							(247,152		)
Operating income							$	48,682

Schedule of reconciliation of segment gross contribution to net income

The following table provides a reconciliation of total segment gross contribution to net income for the periods indicated (in thousands):

	Three Months Ended
	March 31,
	2016		2015
Total segment gross contribution	$	350,547	$	295,834
Costs and expenses:
Cost of services and product development - unallocated (1)	5,322		2,410
Selling, general and administrative	257,411		229,522
Depreciation and amortization	15,017		10,128
Acquisition and integration charges	8,368		5,092
Operating income	64,429		48,682
Interest expense and other	4,122		4,442
Provision for income taxes	20,140		15,889
Net income	$	40,167	$	28,351

(1) The unallocated amounts consist of certain bonus and related fringe costs recorded in Consolidated cost of services and product development expense that are not allocated to segment expense. The Company's policy is to only allocate bonus and related fringe charges to segments for up to 100% of the segment employee's target bonus. Amounts above 100% are absorbed by corporate.